129126387754 has 24 divisors (see below), whose sum is σ = 239697001440. Its totient is φ = 51082965648.

The previous prime is 129126387751. The next prime is 129126387799. The reversal of 129126387754 is 457783621921.

It is a super-2 number, since 2×129126387754² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129126387695 and 129126387704.

It is not an unprimeable number, because it can be changed into a prime (129126387751) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27285544 + ... + 27290275.

It is an arithmetic number, because the mean of its divisors is an integer number (9987375060).

Almost surely, 2^129126387754 is an apocalyptic number.

129126387754 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

129126387754 is a deficient number, since it is larger than the sum of its proper divisors (110570613686).

129126387754 is a wasteful number, since it uses less digits than its factorization.

129126387754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54575854 (or 54575841 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 55.

The spelling of 129126387754 in words is "one hundred twenty-nine billion, one hundred twenty-six million, three hundred eighty-seven thousand, seven hundred fifty-four".